Pen point



` Oct. l0, 1939.

W. T. HAME'R v PEN POINT Filed Dc. 2, 1936 ATTORNEYS Patented Oct. 10,1939 PEN POINT William T. Hamer, New York, N. il.,l assignorv I to EaglePencil Company, New York, N. Y., a

corporation of Delaware Application December 2, 1936, Serial No. 113,767

4 Claims.

My present invention relates to pen points and while desirably embodiedin steel, preferably in stainless steel, is also useful for gold penpoints.

Among the objects of the invention are to pro- 5 Vide an inexpensive penpoint, which though made of steel will approximate the desirable writingcharacteristics of a costly iridium tipped pen and in particular willwrite smoothly, without the scratching or sputtering due to the catchling of the sharp point on the iibre of the paper, so frequently incurredin the use of ordinary steel pens.

Another object is to provide a pen point of the above type made of asingle blank without l acsessory elements such as tips attached thereto,which shall have superior ink feeding properties and in which thedesired hardness orv resiliency of the metal is not impaired because ofany undue mechanical strain on the metal stock in the 20 course offabrication of the pen.

Another object is to provide a method of shaping a pen point and moreespecially a stainless steel pen point which can be expeditiously andinexpensively executed without the need for any 25 heat treatment, toproduce a product of uniform excellence.

In the accompanying drawing in which is shown one of various possibleembodiments of the several features of the invention,

Fig. l is a perspective view on a somewhat enlarged scale of the penpoint,

Fig. 2 is a plan view of the curved blank from which the pen isfabricated,

Fig. 3 is a view similar to Fig. 2 showing the 35 blank with itsaperture and its longitudinal slit,

Fig. 4 is a sectional view on a larger scale illustrating the method ofrolling over the point of the pen, and

Fig. 5 is a fragmentary view on a greatly en- 40 larged scale showingthe point construction of the completed pen.

Referring now to the drawing, the pen point is made from a blank I0 andcomprises the usual somewhat tapered cylindrical shank II and the 45more nearly flattened triangular point end I2, which however iselongated as a rectangular strip I3 at its point. The strip I3 is quitesoft and can readily be bent to desired form as hereinafter described.

In Fig. 3 is shown the central aperture I4 and the longitudinal slit I5cut into the blank either by a separate operation or in the initialprocess of stamping out the blank, said slit extending centrally andlongitudinally of the blank.

In the sectional view of Fig. 4 is shown the (Cl. 1Z0-109) forming dieI6 which has a transverse cylindrical tunnel Il and a tangential inletslot I8 through which end I3 of the pen point is inserted. As the penpoint held in a chuck (not shown) is pushed forward, strip I3 is rolledbackward along the concave surface of the die for a half turn to form anearly circular ovoid or substantially annular loop I9 as shown, withthe cut edge 20 engaging the concave side of the pen at a distance fromthe rounded writing surface thus formed. After the point has thus beenshaped it may be laterally pushed out of the die I6, the tunnel II andinlet slot I8, both extending through the face 22 of the die block I6for that purpose. In the operation set forth the steel of the soft penstock becomes suitably hardened but it is not split due to over-strainas might be the case if the metal were pressed flat or creased.

smoothness of writing comparable with that accomplished by the iridiumtip of a gold pen results from the smooth hardened rounded point endwhich affords a ball-like surface. The scratching and sputtering inwriting, due to the catching on the paper fibre of a sharp or crackededge of metal is thus precluded.

The free extremity of the looped extension being substantially as wideat the contacting inner end as the root of the loop, the said loop isstrong and not too flexible and has the desired wearing and writingproperties. Yet the pen is not too stili, since the forward end of theslit I5 will separate as will the loop elements I8 at opposite sides ofsaid slit under writing pressure.

While the lateral edges of the loop may be the raw cut edges of thestock, it is preferred to resort to a final buiiing or tumblingoperation which results in rounding off said lateral edges as at 23 andalso the edges of said slit as at 24.

In addition to the foregoing advantages the annular loop I9 especiallyin View of its location at the under face of the pen point affords theadvantage of capillarity to retain a drop of ink which contributes tothe ease of starting.

As many changes could be made in the above construction and method andmany apparently widely different embodiments of this invention could bemade without departing from the scope of the claims, it is intended thatall matter contained in the above description or shown in theaccompanying drawing shall be interpreted as illustrative and not in alimiting sense.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. A writing pen comprising a sheet metal body having a concave innerside and a split point with a longitudinal extension reversely extendinginwardly towards the concave side of the pen in the form of an opensubstantially circular loop to form a rounded writing point.

2. A writing pen comprising a sheet metal body having a concave innerside and a split point with a split longitudinal extension at its outerend of substantially uniform width reversely extending inwardly towardsthe concave side of the pen in the shape of an open loop and serving asa rounded writing point.

3. A writing pen comprising a sheet metal body having a concave innerside and a split point with a split longitudinal extension at its outerend of substantially uniform width reversely extending inwardly towardsthe concave side of the pen as a substantially annular loop constitutinga rounded writing point the outer end of said extension being inengagement with the concave side of the pen.

4. A writing pen comprising a sheet metal body transversely curved andaording a generally triangular point, said sheet having a unitarylongitudinal extension at its point of substantially uniform Width andreversely extending inwardly for half a turn towards the concave side ofthe pen as a substantially annular loop, the outer end of said extensionbeing in engagement with the concave side of the pen and the lateraledges of said loop being rounded.

WILLIAM T. HAMER.

